Some sources claimed that they have seen the sample of the
low-cost iPhone, which will come with a larger display, meeting
the prevailing trend for the adoption of 5-inch displays for
high-end models. They added that the low-priced iPhone will also
have a brand new exterior design.

Any story claiming a new iPhone screen size needs to specify pixel counts. Same pixel count as existing iPhone but a bigger screen? New (higher) pixel count? Makes a huge difference for developers. Color me skeptical that Apple would introduce another new screen size of any sort. Even the minimal shift from a 3.5-inch 960 × 640 to a 4-inch 1136 × 640 has taken months for developers to catch up with.